@article{fdi:010090334,
  title = {{G}enomic introgressions from {A}frican rice ({O}ryza glaberrima) in {A}sian rice ({O}. sativa) lead to the identification of key {QTL}s for panicle architecture},
  author = {{A}dam, {H}{\'e}l{\`e}ne and {G}uti{\'e}rrez, {A}. and {C}ouderc, {M}arie and {S}abot, {F}ran{\c{c}}ois and {N}takirutimana, {F}. and {S}erret, {J}ulien and {O}rjuela, {J}. and {T}regear, {J}ames and {J}ouannic, {S}tefan and {L}orieux, {M}athias},
  editor = {},
  language = {{ENG}},
  abstract = {{B}ackground {D}eveloping high yielding varieties is a major challenge for breeders tackling the challenges of climate change in agriculture. {T}he panicle (inflorescence) architecture of rice is one of the key components of yield potential and displays high inter- and intra-specific variability. {T}he genus {O}ryza features two different crop species: {A}sian rice ({O}ryza sativa {L}.) and the {A}frican rice ({O}. glaberrima {S}teud.). {O}ne of the main morphological differences between the two independently domesticated species is the structure (or complexity) of the panicle, with {O}. sativa displaying a highly branched panicle, which in turn produces a larger number of grains than that of {O}. glaberrima. {T}he gene regulatory network that governs intra- and interspecific panicle diversity is still under-studied. {R}esults {T}o identify genetic factors linked to panicle architecture diversity in the two species, we used a set of 60 {C}hromosome {S}egment {S}ubstitution {L}ines ({CSSL}s) issued from third generation backcross ({BC}3{DH}) and carrying genomic segments from {O}. glaberrima cv. {MG}12 in the genetic background of {O}. sativa {T}ropical {J}aponica cv. {C}aiapo. {P}henotypic data were collected for rachis and primary branch length, primary, secondary and tertiary branch number and spikelet number. {A} total of 15 {QTL}s were localized on chromosomes 1, 2, 3, 7, 11 and 12, {QTL}s associated with enhanced secondary and tertiary branch numbers were detected in two {CSSL}s. {F}urthermore, {BC}4{F}3:5 lines carrying different combinations of substituted segments were produced to decipher the effects of the identified {QTL} regions on variations in panicle architecture. {A} detailed analysis of phenotypes versus genotypes was carried out between the two parental genomes within these regions in order to understand how {O}. glaberrima introgression events may lead to alterations in panicle traits. {C}onclusion {O}ur analysis led to the detection of genomic variations between {O}. sativa cv. {C}aiapo and {O}. glaberrima cv. {MG}12 in regions associated with enhanced panicle traits in specific {CSSL}s. {T}hese regions contain a number of key genes that regulate panicle development in {O}. sativa and their interspecific genomic variations may explain the phenotypic effects observed.},
  keywords = {{O}ryza glaberrima ; {O}ryza sativa ; {C}hromosome segment substitution lines ; {P}anicle architecture ; {QTL} ; {G}enomic variation},
  booktitle = {},
  journal = {{BMC} {G}enomics},
  volume = {24},
  numero = {1},
  pages = {587 [21 p.]},
  ISSN = {1471-2164},
  year = {2023},
  DOI = {10.1186/s12864-023-09695-6},
  URL = {https://www.documentation.ird.fr/hor/fdi:010090334},
}